package live.filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;

public class Filter extends HttpServlet implements javax.servlet.Filter {

	protected String encoding = null;
	protected FilterConfig filterConfig = null;
	protected boolean ignore = true;

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		this.encoding = null;
		this.filterConfig = null;
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain filter) throws IOException, ServletException {
		// TODO Auto-generated method stub

		if (ignore || (request.getCharacterEncoding() == null)) {

			String encoding = selectEncoding(request);

			if (encoding != null){

				request.setCharacterEncoding(encoding);
				
				response.setCharacterEncoding(encoding);
				
			}

		}

		filter.doFilter(request, response);

	}

	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		this.filterConfig = filterConfig;

		this.encoding = filterConfig.getInitParameter("encoding");

		String value = filterConfig.getInitParameter("ignore");

		if (value == null)

			this.ignore = true;

		else if (value.equalsIgnoreCase("true"))

			this.ignore = true;

		else if (value.equalsIgnoreCase("yes"))

			this.ignore = true;

		else

			this.ignore = false;

	}

	protected String selectEncoding(ServletRequest request) {

		return (this.encoding);

	}

}
